Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share Table

	For the three months ended
	March 31,
	2012	2011
Net income attributable to Southwestern Energy (in thousands)	$              107,704	$              136,609
Number of common shares:
Weighted average outstanding	348,000,074	346,833,906
Issued upon assumed exercise of outstanding stock options	1,889,691	2,700,902
Effect of issuance of nonvested restricted common stock	100,960	162,519
Weighted average and potential dilutive outstanding(1)	349,990,725	349,697,327
Earnings per share:
Net income attributable to Southwestern Energy stockholders – basic	$                   0.31	$                   0.39
Net income attributable to Southwestern Energy stockholders – diluted	$                   0.31	$                   0.39